Key



FIG. 1 is a left side view of a key according to my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines show portions of the key that form no part of the claimed design. 

CLAIM The ornamental design for a key, as shown and described. 